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- W4386770107 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Mars’ ionosphere is formed through ionization of the neutral atmosphere by solar irradiance, charge exchange, and electron impact. Observations by Mars Atmosphere and Volatile EvolutioN (MAVEN) spacecraft have shown a highly dynamic ionospheric layer at Mars impacted by loss processes including ion escape, transport, and electron recombination. The crustal fields at Mars can also significantly modulate the ionosphere. We use MAVEN data to perform a statistical analysis of ionospheric density depletions around crustal fields. Events mostly occur when the crustal magnetic field are radial, outward, and with a mild preference towards east in the planetocentric coordinates. We show that events near crustal fields are typically accompanied by an increase in suprathermal electrons within the depletion, either throughout the event or as a short-lived electron beam. However, no correlation between the changes in the bulk electron densities and suprathermal electron density variations is observed. Our analysis indicates that the temperature of the major ionospheric species, O<sub>2</sub><sup>+</sup>, increases during most of the density depletion events, which could indicate that some ionospheric density depletions around crustal fields are a result of ion frictional heating." @default.
- W4386770107 created "2023-09-16" @default.
- W4386770107 creator A5047323895 @default.
- W4386770107 date "2023-09-15" @default.
- W4386770107 modified "2023-09-26" @default.
- W4386770107 title "Comment on egusphere-2023-1799" @default.
- W4386770107 doi "https://doi.org/10.5194/egusphere-2023-1799-rc1" @default.
- W4386770107 hasPublicationYear "2023" @default.
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